<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			
			Object.prototype.n = 10;
			
			function F() {
				this.n = 11;
			}
			F.prototype.n = 12;
			console.log(F.n); // 输出？
			
			let f1 = new F();
			console.log(f1.n); // 输出？
		</script>
	</body>
</html>
